#: 14809 S12/OS9/68000 (OSK)
    05-Apr-92  20:46:00
Sb: #14769-#more serial wierdness
Fm: Carl Kreider 71076,76
To: Steve Wegert 76703,4255 (X)

Steve,

I spent a bit of time staring at your problem, and I think you may in fact have
several.  We know there is something wrong with the 901 driver because it gets
in the 'one behind' mode.  But your are right about t0 not looking right.  The
address is wrong and the priority is wrong.  The address is actually that of
the interrupt pending register B.  It seems like something or someone has
overwritten them.  Since that register does deal with floppy and hard disk I/O,
perhaps it isn't too surprising that floppy access can hang the system.  Can
Mark or anyone else duplicate those results?

Carl

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